The document https://www.libraw.org/docs/API-CXX.html#open_datastream says that it will fill imgdata.sizes. However, it seems that raw_pitch is not really filled, and is only available after unpacking. Is this expected? Are there any fields listed in the doc also available only after unpacking? It will be useful to know this as unpacking takes time and I would like to be able to do some initialization in parallel based on the available data. Thanks!